Astoria Studios, the longtime home of “Sesame Street,” could use a lesson in good government because it stopped paying its water bills when the city stopped sending them back in 1995, an audit has found.

The Queens TV and film complex finally forked over $135,237 last year after auditors for Comptroller William Thompson spotted the decade-long oversight.

Asked why the studio hadn’t paid the bills before it was caught, spokeswoman Deborah Green said, “Obviously, there was some human error.”